Y squared plus x equals 7. determine whether this is a function?

Answer 1

y2 + x = 7 : this can be written as y2 = 7 - x or x = 7 - y2.

There is not a specific solution to this identity. For each different value assigned to x then a different value is generated for y. Or, it can be viewed that for each different value assigned to y then a different value is generated for x.

This expression is therefore a function.